CN110559746B - Waste gas recovery experiment system and implementation method - Google Patents
Waste gas recovery experiment system and implementation method Download PDFInfo
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- CN110559746B CN110559746B CN201910831346.9A CN201910831346A CN110559746B CN 110559746 B CN110559746 B CN 110559746B CN 201910831346 A CN201910831346 A CN 201910831346A CN 110559746 B CN110559746 B CN 110559746B
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Abstract
The invention discloses an exhaust gas recovery system and an implementation method, wherein an exhaust gas recovery unit is added in a vacuum/pressurization experiment system, the exhaust gas recovery unit is connected to one end of a vacuum unit of the experiment system, and exhaust gas generated by an experiment is received and stored in a recovery gas cylinder, so that the embodiment of the invention realizes the recovery of exhaust gas under the condition of providing vacuum/pressurization working conditions of the experiment.
Description
Technical Field
The invention relates to the technical field of experiments, in particular to an exhaust gas recovery system and an implementation method.
Background
The space experiment performed on the satellite platform provides a large amount of experimental data and experimental results for various fields, so that various experiments of different types are performed on the satellite platform. The cost of performing experiments on satellite platforms is high, including the cost of launching, the cost of experimental energy, the cost of running in space, and the like. In order to reduce the research experiment cost, the experiment design and planning are followed as much as possible with the principles of low cost and high reliability, and the experiment system arranged in the satellite platform is used for completing a plurality of different experiments as much as possible, so that the function of the arranged experiment system is expanded as much as possible by adopting the guiding thought that the special experiment system approaches to the universal experiment system when the experiment system is arranged. Further, in view of the complexity of the satellite platform environment, the experimental system is set up to avoid the dependence on the external environment as much as possible.
A vacuum and pressurization system may be configured in the satellite platform for performing vacuum and pressurized space experiments. However, when the experiment is completed under the vacuum and/or pressurized working conditions of the satellite platform, the first-level vacuum or the exhaust gas interface provided by the external environment is needed, if the gas is directly discharged to the exhaust gas system of the satellite platform, the gas waste is caused, the gas transportation cost of the satellite platform is increased, and the frequent replacement of the gas bottle for loading the gas required by the experiment is not easy to implement.
Similarly, the vacuum and pressurization system constructed on the ground can directly discharge the exhaust gas into the environment under vacuum and/or pressurization conditions, resulting in gas waste and pollution to the environment.
Disclosure of Invention
In view of this, the embodiment of the invention provides an exhaust gas recovery experiment system, which can realize recovery of exhaust gas under the condition of providing vacuum/pressurization working conditions for experiments.
The embodiment of the invention provides an implementation method of an exhaust gas recovery experiment, which can realize the recovery of exhaust gas under the condition of providing vacuum/pressurization working conditions of the experiment.
The embodiment of the invention is realized as follows:
an exhaust gas recovery system, comprising: an experiment cavity, a vacuum unit, a gas storage and supply unit and an exhaust gas recovery unit, wherein,
the gas storage and supply unit is connected to the experiment cavity through a gas inlet, and gas is input into the experiment cavity through the gas inlet until the pressure of the experiment cavity reaches a set value;
one end of the vacuum unit is connected to a gas outlet of the experiment cavity, the other end of the vacuum unit is connected to the waste gas recovery unit, the experiment cavity is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit;
the waste gas recovery unit is provided with a recovery gas cylinder, and the waste gas recovery unit is connected to the other end of the vacuum unit, and waste gas input by the vacuum unit is received and stored in the recovery gas cylinder.
Further comprises: the gas recovery and multiplexing unit, the waste gas recovery unit also comprises a four-way switch, wherein,
the four-way switch is respectively connected with the other end of the vacuum unit and the other end of the gas recovery and multiplexing unit;
one end of the gas recovery and multiplexing unit is connected to the gas storage and supply unit, and the recovered gas in the experiment cavity is recovered through the vacuum unit by opening and closing the four-way switch, and is input into the gas storage and supply unit for storage through the gas recovery and multiplexing unit.
The exhaust gas recovery unit includes: the four-way switch is connected in series with the second booster pump, the fourth electromagnetic valve and the recovery gas cylinder, when the second booster pump receives the waste gas input by the vacuum unit and stores the waste gas in the recovery gas cylinder, the second booster pump is opened to boost the waste gas, and the fourth electromagnetic valve is opened to enable the boosted waste gas to be introduced into the recovery gas cylinder.
And a third stop valve is further arranged between the recovery gas cylinder and the fourth electromagnetic valve and used for stopping the waste gas flowing into the recovery gas cylinder.
The four-way switch in the waste gas recovery unit is also provided with a concentration sensor for detecting the concentration of waste gas, and when the concentration of the waste gas reaches a set value, the second booster pump and the fourth solenoid valve are closed to stop the flow of the waste gas into the recovery gas cylinder.
The waste gas recovery unit further comprises a pressure sensor of the recovery gas cylinder, the pressure sensor is arranged between the third stop valve and the recovery gas cylinder, and the pressure of the recovery gas cylinder is monitored.
One switch of the four-way switch in the waste gas recovery unit for opening and closing the other end of the vacuum unit is also provided with a temperature sensor of the vacuum unit and a fifth electromagnetic valve, the temperature sensor of the vacuum unit monitors the temperature of the waste gas flowing into the waste gas recovery unit, and when the temperature reaches a set value, the fifth electromagnetic valve is closed to stop the waste gas recovery unit from recovering the waste gas.
A method for implementing exhaust gas recovery, the method comprising:
the experimental device comprises an experimental cavity, a vacuum unit, a gas storage and supply unit and an exhaust gas recovery unit;
the gas storage and supply unit is connected to the experiment cavity through a gas inlet, and gas is input into the experiment cavity through the gas inlet until the pressure of the experiment cavity reaches a set value;
one end of the vacuum unit is connected to a gas outlet of the experiment cavity, the other end of the vacuum unit is connected to the waste gas recovery unit, the experiment cavity is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit;
the waste gas recovery unit is provided with a recovery gas cylinder, and the waste gas recovery unit is connected to the other end of the vacuum unit, and waste gas input by the vacuum unit is received and stored in the recovery gas cylinder.
The method further comprises the steps of:
the gas recovery and multiplexing unit is arranged, one end of the gas recovery and multiplexing unit is connected into the vacuum unit, and the other end of the gas recovery and multiplexing unit is connected into the gas storage and supply unit;
the recycling gas in the experiment cavity is recycled through the vacuum unit, and is input into the gas storage and supply unit for storage through the gas recycling and multiplexing unit.
The method further comprises the steps of:
the waste gas recovery unit monitors whether the gas concentration of the input waste gas reaches a set value, and if so, the input of the waste gas is stopped;
the set value is the concentration value of the gas storage bottle in the gas storage and supply unit or the set value is 0 and the vacuum value in the experimental cavity is measured to reach the set initial target vacuum value.
As seen above, in the embodiment of the present invention, in the vacuum/pressurization experiment system provided, the exhaust gas recovery unit is added, and the exhaust gas recovery unit is connected to one end of the vacuum unit of the experiment system, receives the exhaust gas generated in the experiment and stores the exhaust gas in the provided recovery gas cylinder, so that the embodiment of the present invention realizes recovery of the exhaust gas under the condition of providing the vacuum/pressurization working condition of the experiment.
Drawings
FIG. 1 is a schematic diagram of an experimental system for recovering exhaust gas according to an embodiment of the present invention;
fig. 2 is a flow chart of an implementation method of an exhaust gas recovery experiment according to an embodiment of the present invention.
Reference numerals
101-experiment cavity
1011-vacuum gauge unit
1012-pressure gauge unit
102-vacuum unit
1021-mechanical pump
1022-third electronic valve
1023-Filter
1024-molecular pump
1025-fourth electronic valve
1026-mechanical pump check valve
103-gas storage and supply unit
1031-gas storage bottle
1032-first stop valve
1033-pressure reducing valve
1034-second stop valve
1035-first solenoid valve
1036-inflating one-way valve
1037-first pressure sensor
1038-second pressure sensor
1039-safety valve
104-gas recovery and multiplexing unit
1041-booster pump
1042-stabilized pressure bottle
1043-second electronic valve
1044-third pressure sensor
105-waste gas recovery unit
1051-recovery gas cylinder
1052-four-way switch
1053-second booster pump
1054-fourth solenoid valve
1055-third stop valve
1056-concentration sensor
1057-pressure sensor for recovery gas cylinder
1058-temperature sensor of vacuum unit
1059-fifth solenoid valve
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and examples.
In the embodiment of the invention, an exhaust gas recovery unit is added in the vacuum/pressurization experiment system, the exhaust gas recovery unit is connected to one end of the vacuum unit of the experiment system, receives the exhaust gas generated by the experiment and stores the exhaust gas in the recovery gas cylinder,
thus, the embodiment of the invention realizes the recovery of the exhaust gas under the condition of providing experimental vacuum/pressurization working conditions.
The waste gas recovery system provided by the embodiment of the invention can be applied to the ground and also can be applied to a satellite platform. Whether applied to a satellite platform or the ground, the waste gas can be effectively recovered after the pressurization or/and vacuum experiment is realized. The following describes in detail how the exhaust gas recovery system applied to the satellite platform specifically performs exhaust gas recovery.
Fig. 1 is a schematic structural diagram of an exhaust gas recovery experiment system according to an embodiment of the present invention, where the system is disposed in a satellite platform, and includes: an experimental chamber 101, a vacuum unit 102, a gas storage and supply unit 103, and an exhaust gas recovery unit 105, wherein,
the gas storage and supply unit 103 is connected to the experiment chamber 101 through a gas inlet through which gas is inputted into the experiment chamber 101 until the pressure of the experiment chamber 101 reaches a set value;
one end of the vacuum unit 102 is connected to a gas outlet of the experiment cavity 101, the other end is connected to the waste gas recovery unit 105, the experiment cavity 101 is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit 105;
the exhaust gas recovery unit 105 is provided with a recovery gas cylinder 1051, and the exhaust gas recovery unit 105 is connected to the other end of the vacuum unit 102, receives the exhaust gas input from the vacuum unit 102, and stores the exhaust gas in the recovery gas cylinder 1051.
The system also comprises a gas recovery and multiplexing unit 104, the waste gas recovery unit 105 also comprises a four-way switch 1052, the four-way switch 1052 is respectively connected with the other end of the vacuum unit 102, and the other end of the gas recovery and multiplexing unit 104; one end of the gas recovery and multiplexing unit 104 is connected to the gas storage and supply unit 103, and the recovered gas in the experiment cavity 101 is recovered by the vacuum unit 102 by opening and closing the four-way switch 1052, and is input into the gas storage and supply unit 103 for storage through the gas recovery and multiplexing unit 104.
In this system, the exhaust gas recovery unit 105 includes: the four-way switch 1052 is connected in series to the second booster pump 1053, the fourth solenoid valve 1054 and the recovery gas cylinder 1051, and when the exhaust gas input from the vacuum unit 102 is stored in the recovery gas cylinder 1051, the second booster pump 1053 is opened to boost the exhaust gas, and the fourth solenoid valve 1054 is opened to allow the boosted exhaust gas to flow into the recovery gas cylinder 1051.
In this system, a third shutoff valve 1055 is further provided between the recovery gas cylinder 1051 and the fourth solenoid valve 1054, and the exhaust gas flowing into the recovery gas cylinder 1051 is blocked.
In this system, the four-way switch 1052 in the exhaust gas recovery unit 105 further includes a concentration sensor 1056 for detecting the concentration of the exhaust gas, and when the concentration of the exhaust gas reaches a set value, the second booster pump 1053 and the fourth solenoid valve 1054 are closed to stop the flow of the exhaust gas into the recovery gas cylinder 1051.
Here, the set value may be set as a concentration value of the gas cylinder 1031 in the gas storage and supply unit 103, and when the set value is reached, it is verified that the experiment chamber 101 is cleaned or the surplus gas generated by the experiment is exhausted, the second booster pump 1053 and the fourth solenoid valve 1054 are closed, so that the surplus gas is compressed back into the gas cylinder 1031 in the gas storage and supply unit 103 by the gas recovery and multiplexing unit 104.
Here, the set value may also be set to 0, and when the set value of 0 is reached and the vacuum value in the experimental chamber 101 is measured to reach the set initial target vacuum value, it is proved that the gas in the experimental chamber 101 is compressed into the recovery gas cylinder 1051.
In this system, the exhaust gas recovery unit 105 further includes a recovery gas cylinder pressure sensor 1057 provided between the third stop valve 1055 and the recovery gas cylinder 1051, and monitors the pressure of the recovery gas cylinder 1051.
In this system, one switch of the four-way switch 1052 in the exhaust gas recovery unit 105 that opens and closes the other end of the vacuum unit 102 is further provided with a temperature sensor 1058 of the vacuum unit and a fifth solenoid valve 1059, and the temperature sensor 1058 of the vacuum unit monitors the temperature of the exhaust gas flowing into the exhaust gas recovery unit 105, and when the temperature reaches a set value, the fifth solenoid valve 1059 is closed to stop the recovery of the exhaust gas by the exhaust gas recovery unit 105.
In the embodiment of the invention, when experiments are performed on a satellite platform or the ground, in order to avoid cross contamination between experiments, the experiment cavity 101 needs to be washed after one experiment is completed, and the washed waste gas is subjected to uniform recovery treatment, so that the waste gas recovery unit 105 provided by the embodiment of the invention plays a role.
The system provided by the embodiment of the invention can provide an experiment cavity in a vacuum/pressurized environment of all kinds, is compatible with the recovery treatment of toxic and polluted waste gas generated in the experiment process, and independently completes the cleaning and treatment work of the experiment cavity, and simultaneously, the recovery of the waste gas in the experiment also provides convenience and basis for scientific experiment work such as gas components generated in the later analysis experiment.
In the embodiment of the invention, when the system adopts an exhaust gas recovery mode, the system is mainly suitable for the following experiments:
1) Generating redundant or polluted gas experiments in the experiment process;
2) The experiment cavity is polluted in the experiment process, and the experiment container is required to be cleaned after the experiment is completed;
3) The gas generated in the experimental process needs to be collected, and the later experiment of scientific analysis and research needs to be carried out.
The system provided by the embodiment of the invention greatly expands the available experimental range on a satellite platform or the ground, and reduces the dependence on the external environment. After the pressure experiment is completed, the gas recovery and multiplexing unit is adopted to directly recover the recovered gas into the gas storage and supply unit to complete the recovery and reutilization of the recovered gas. For special experiments, after the vacuum or pressurization experiment is completed, an exhaust gas recovery unit is needed to recover different experimental exhaust gases.
In this system, the gas storage and supply unit 103 is composed of a charge check valve 1036, a gas cylinder 1031, a first shut-off valve 1032, a pressure reducing valve 1033, a second shut-off valve 1034, and a first solenoid valve 1035 in series, wherein,
when the experiment cavity 101 is pressurized, the inflation one-way valve 1036 is closed, the first stop valve 1032, the pressure reducing valve 1033, the second stop valve 1034 and the first electromagnetic valve 1035 are sequentially opened, so that the gas in the gas storage bottle 1031 is input into the experiment cavity 101 through the gas inlet until the pressure of the experiment cavity 101 reaches a set value, and the first stop valve 1032, the pressure reducing valve 1033, the second stop valve 1034 and the first electromagnetic valve 1035 are sequentially closed;
when the gas in the experiment chamber 101 is discharged, the gas-filled check valve 1036 is opened, the first stop valve 1032, the pressure-reducing valve 1033, the second stop valve 1034, and the first solenoid valve 1035 are sequentially closed, and the gas recovered from the experiment chamber 101 by the gas recovery/multiplexing unit 104 is inputted to the gas cylinder 1031 through the gas-filled check valve 1036.
The gas in the gas cylinder 1031 may be various types of gases, such as argon, for pressure testing of the laboratory cavity 101.
A first pressure sensor 1037 is arranged between the gas cylinder 1031 and the first stop valve 1032, and when the pressure of the gas cylinder 1031 is detected and is large, the pressure reducing valve 1033 is opened; a second pressure sensor 1038 is provided between the first shut-off valve 1032 and the second shut-off valve 1033 to detect the pressure of the gas transmitted in the gas passage in the gas storage and supply unit 103, and a temperature sensor may be provided at the position of the second pressure sensor 1038 to detect the temperature of the gas in the gas passage in the gas storage and supply unit 103.
A safety valve 1039 is provided between the first solenoid valve 1035 and the gas inlet port for closing when the gas transferred in the gas passage in the gas storage and supply unit 103 is not safe. A solenoid valve is further provided at the relief valve 1039 to control opening and closing of the relief valve 1039.
In this system, the gas recovery and multiplexing unit 104 is composed of a booster pump 1041, a pressure stabilizing bottle 1042, a second electronic valve 1043 connected in series, wherein,
when the gas in the experiment cavity 101 is discharged, the second electronic valve 1043 is opened, the booster pump 1041 is started, and the gas recovered by the experiment cavity 101 passes through the gas outlet, sequentially passes through the pressure stabilizing bottle 1042 and the booster pump 1041, and is transmitted to the gas storage and supply unit 103;
the second electronic valve 1043 is closed when the experiment chamber 101 is pressurized or the exhaust gas is recovered by the exhaust gas recovery unit 105.
In the gas recovery and multiplexing unit 104, a third pressure sensor 1044 is further included, located between the booster pump 1041 and the pressure stabilizing bottle 1042, and monitors the pressure between the booster pump 1041 and the pressure stabilizing bottle 1042.
A pressure sensor and a temperature sensor are also included between the booster pump 1041 and the charge check valve 1036 in the gas recovery and multiplexing unit 104 for detecting the pressure and temperature of the booster pump 1041.
In this system, the vacuum unit 102 includes:
after the mechanical pump 1021, the third electronic valve 1022, the filter 1023 and the molecular pump 1024 are connected in series, the gas outlet is connected;
when primary vacuum is formed on the experimental cavity 101, the third electronic valve 1022 is opened, the mechanical pump 1021 is started, air molecules in the experimental cavity 101 are filtered by the filter 1023 through the gas outlet and the molecular pump 1024 under the action of the mechanical pump 1021, and are pumped into the mechanical pump 1021 through the third electronic valve 1022 until the experimental cavity 101 reaches the starting pressure of the molecular pump 1024, the molecular pump 1024 is started, and the air molecules in the experimental cavity 101 are continuously pumped, so that a high vacuum environment is realized for the experimental cavity 101.
In the vacuum unit 102, the primary vacuum environment is actually a low vacuum environment.
In the vacuum unit 102, a fourth electronic valve 1025 is further included, one end of the fourth electronic valve 1025 is connected between the third electronic valve 1022 and the filter 1023, the other end of the fourth electronic valve 1025 is connected to a mechanical pump one-way valve 1026 arranged on the mechanical pump 1021, and when the experimental cavity 101 is vacuumized, the fourth electronic valve 1025 is closed.
When the experiment chamber 101 is pressurized, the fourth electronic valve 1025, the third electronic valve 1022, the mechanical pump 1021, and the molecular pump 1024 are closed.
When the pressurized gas is discharged from the experiment chamber 101, the fourth electronic valve 1025 is opened, the third electronic valve 1022 is opened until the pressure of the experiment chamber reaches the pressure set by the booster pump 1041, the mechanical pump 1021 is started, the fourth electronic valve 1025 is closed, and the molecular pump 1024 is opened until the pressure of the experiment chamber reaches the starting pressure of the molecular pump 1024, and the gas recovery and multiplexing unit 104 or the exhaust gas recovery unit 105 is continuously discharged.
In this system, molecular pump 1024 actually controls the directional flow of air molecules in experimental chamber 101 so that air molecules continue to exit experimental chamber 101.
In the system, the experiment cavity 101 is also connected with a vacuum gauge unit 1011, and the vacuum environment of the experiment cavity 101 is monitored to obtain a vacuum value and displayed.
In this system, the experimental cavity 101 is also connected to a pressure gauge unit 1012, and the pressure of the experimental cavity 101 is monitored to obtain a pressure value and displayed.
In this system, the filter 1023 functions to filter impurities of air molecules extracted from the experimental chamber 101, avoiding damage to the mechanical pump 1021.
Fig. 2 is a flowchart of a method for implementing a pressurization experiment according to an embodiment of the present invention, which specifically includes the steps of:
step 201, setting an experiment cavity, a vacuum unit, a gas storage and supply unit and an exhaust gas recovery unit;
step 202, a gas storage and supply unit is connected into an experiment cavity through a gas inlet, and gas is input into the experiment cavity through the gas inlet until the pressure of the experiment cavity reaches a set value;
step 203, one end of the vacuum unit is connected to a gas outlet of the experiment cavity, the other end of the vacuum unit is connected to the waste gas recovery unit, the experiment cavity is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit;
step 204, the waste gas recovery unit is provided with a recovery gas cylinder, the waste gas recovery unit is connected to the other end of the vacuum unit, and waste gas input by the vacuum unit is received and stored in the recovery gas cylinder.
In the method, further comprising: the gas recovery and multiplexing unit is arranged, one end of the gas recovery and multiplexing unit is connected into the vacuum unit, and the other end of the gas recovery and multiplexing unit is connected into the gas storage and supply unit;
the recycling gas in the experiment cavity is recycled through the vacuum unit, and is input into the gas storage and supply unit for storage through the gas recycling and multiplexing unit.
In the method, further comprising:
the exhaust gas recovery unit monitors whether the gas concentration of the input exhaust gas reaches a set value, and if so, stops the input of the exhaust gas.
The set value is the concentration value of the gas storage bottle in the gas storage and supply unit or the set value is 0 and the vacuum value in the experimental cavity is measured to reach the set initial target vacuum value.
In this method, the vacuum unit is further provided with a filter for filtering air molecules discharged through the air passage between the experimental chamber and the mechanical pump.
In this method, real-time pressure monitoring and vacuum monitoring are also performed on the experimental chamber.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (8)
1. An exhaust gas recovery apparatus for performing an experiment on a satellite platform, comprising: an experiment cavity (101), a vacuum unit (102), a gas storage and supply unit (103) and an exhaust gas recovery unit (105), wherein,
the gas storage and supply unit (103) is connected into the experiment cavity (101) through a gas inlet, and gas is input into the experiment cavity through the gas inlet until the pressure of the experiment cavity reaches a set value;
one end of the vacuum unit (102) is connected to a gas outlet of the experiment cavity (101), the other end of the vacuum unit is connected to the waste gas recovery unit (105), the experiment cavity (101) is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit (105);
the waste gas recovery unit (105) is provided with a recovery gas cylinder (1051), the waste gas recovery unit (105) is connected to the other end of the vacuum unit (102), and waste gas input by the vacuum unit (102) is received and stored in the recovery gas cylinder (1051);
further comprises: the gas recovery and multiplexing unit (104) and the waste gas recovery unit (105) also comprise a four-way switch (1052), wherein,
the four-way switch (1052) is respectively connected with the other end of the vacuum unit (102) and the other end of the gas recovery and multiplexing unit (104);
one end of the gas recovery and multiplexing unit (104) is connected to the gas storage and supply unit (103), and the recovery gas in the experiment cavity (101) is recovered through the vacuum unit (102) by opening and closing the four-way switch (1052), and is input into the gas storage and supply unit (103) for storage through the gas recovery and multiplexing unit (104);
the vacuum unit (102) comprises:
the mechanical pump (1021), the third electronic valve (1022), the filter (1023) and the molecular pump (1024) are connected in series and then connected into the gas outlet;
when primary vacuum is formed on the experimental cavity (101), the primary vacuum is a low vacuum environment, a third electronic valve (1022) is opened, a mechanical pump (1021) is started, air molecules in the experimental cavity (101) are filtered through a gas outlet and a molecular pump (1024) under the action of the mechanical pump (1021), and are pumped into the mechanical pump (1021) through the third electronic valve (1022) after being filtered through a filter (1023), until the experimental cavity (101) reaches the starting pressure of the molecular pump (1024), the molecular pump (1024) is started, and the air molecules in the experimental cavity (101) are continuously pumped, so that a high vacuum environment is realized for the experimental cavity (101);
in the vacuum unit (102), the vacuum unit further comprises a fourth electronic valve (1025), one end of the fourth electronic valve (1025) is connected between the third electronic valve (1022) and the filter (1023), the other end of the fourth electronic valve is connected to a mechanical pump one-way valve (1026) arranged on the mechanical pump (1021), and when the experimental cavity (101) is vacuumized, the fourth electronic valve (1025) is closed.
2. The apparatus according to claim 1, wherein the exhaust gas recovery unit (105) comprises: the four-way switch (1052) is connected in series with the second booster pump (1053), the fourth electromagnetic valve (1054) and the recovery gas cylinder (1051), when the second booster pump (1053) receives the waste gas input by the vacuum unit (102) and stores the waste gas into the recovery gas cylinder (1051), the second booster pump (1053) is opened to boost the waste gas, and the fourth electromagnetic valve (1054) is opened to enable the boosted waste gas to be introduced into the recovery gas cylinder (1051).
3. The apparatus according to claim 2, wherein a third shutoff valve (1055) is further provided between the recovery gas cylinder (1051) and the fourth electromagnetic valve (1054) to shut off the exhaust gas flowing into the recovery gas cylinder (1051).
4. The apparatus according to claim 2, wherein the four-way switch (1052) in the exhaust gas recovery unit (105) further has a concentration sensor (1056) for detecting the concentration of the exhaust gas, and when the concentration of the exhaust gas reaches a set value, the second booster pump (1053) and the fourth solenoid valve (1054) are closed to stop the flow of the exhaust gas into the recovery gas cylinder (1051).
5. The apparatus according to claim 2, wherein the exhaust gas recovery unit (105) further comprises a recovery cylinder pressure sensor (1057) arranged between the third shut-off valve (1055) and the recovery cylinder (1051), monitoring the pressure of the recovery cylinder (1051).
6. The apparatus according to claim 2, wherein the one-way switch of the four-way switch (1052) in the exhaust gas recovery unit (105) that opens and closes the other end of the vacuum unit (102) is further provided with a temperature sensor (1058) of the vacuum unit (102) and a fifth solenoid valve (1059), the temperature sensor (1058) of the vacuum unit (102) monitors the temperature of the exhaust gas flowing into the exhaust gas recovery unit (105), and when the temperature reaches a set value, the fifth solenoid valve (1059) is closed to stop the exhaust gas recovery unit (105) from recovering the exhaust gas.
7. An implementation method for recycling waste gas is characterized by being used for completing experiments on a satellite platform, and comprises the following steps:
the experimental device comprises an experimental cavity, a vacuum unit, a gas storage and supply unit and an exhaust gas recovery unit;
the gas storage and supply unit is connected to the experiment cavity through a gas inlet, and gas is input into the experiment cavity through the gas inlet until the pressure of the experiment cavity reaches a set value;
one end of the vacuum unit is connected to a gas outlet of the experiment cavity, the other end of the vacuum unit is connected to the waste gas recovery unit, the experiment cavity is vacuumized before pressurization, and after the pressurization experiment is completed, the waste gas is recovered to the waste gas recovery unit;
the waste gas recovery unit is provided with a recovery gas cylinder, the waste gas recovery unit is connected to the other end of the vacuum unit, and waste gas input by the vacuum unit is received and stored in the recovery gas cylinder;
the method further comprises the steps of:
the gas recovery and multiplexing unit is arranged, one end of the gas recovery and multiplexing unit is connected into the vacuum unit, and the other end of the gas recovery and multiplexing unit is connected into the gas storage and supply unit;
the recovery gas in the experiment cavity is recovered through the vacuum unit, and is input into the gas storage and supply unit for storage through the gas recovery and multiplexing unit;
the vacuum unit of the method comprises:
the mechanical pump (1021), the third electronic valve (1022), the filter (1023) and the molecular pump (1024) are connected in series and then connected into the gas outlet;
when primary vacuum is formed on the experimental cavity (101), the primary vacuum is a low vacuum environment, a third electronic valve (1022) is opened, a mechanical pump (1021) is started, air molecules in the experimental cavity (101) are filtered through a gas outlet and a molecular pump (1024) under the action of the mechanical pump (1021), and are pumped into the mechanical pump (1021) through the third electronic valve (1022) after being filtered through a filter (1023), until the experimental cavity (101) reaches the starting pressure of the molecular pump (1024), the molecular pump (1024) is started, and the air molecules in the experimental cavity (101) are continuously pumped, so that a high vacuum environment is realized for the experimental cavity (101);
in the vacuum unit (102), the vacuum unit further comprises a fourth electronic valve (1025), one end of the fourth electronic valve (1025) is connected between the third electronic valve (1022) and the filter (1023), the other end of the fourth electronic valve is connected to a mechanical pump one-way valve (1026) arranged on the mechanical pump (1021), and when the experimental cavity (101) is vacuumized, the fourth electronic valve (1025) is closed.
8. The method of claim 7, wherein the method further comprises:
the waste gas recovery unit monitors whether the gas concentration of the input waste gas reaches a set value, and if so, the input of the waste gas is stopped;
the set value is the concentration value of the gas storage bottle in the gas storage and supply unit or the set value is 0 and the vacuum value in the experimental cavity is measured to reach the set initial target vacuum value.
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